JPS6246808Y2 - - Google Patents
Info
- Publication number
- JPS6246808Y2 JPS6246808Y2 JP1982078358U JP7835882U JPS6246808Y2 JP S6246808 Y2 JPS6246808 Y2 JP S6246808Y2 JP 1982078358 U JP1982078358 U JP 1982078358U JP 7835882 U JP7835882 U JP 7835882U JP S6246808 Y2 JPS6246808 Y2 JP S6246808Y2
- Authority
- JP
- Japan
- Prior art keywords
- resonance chamber
- intake
- cylinder
- resonance
- cylinders
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000446 fuel Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000010349 pulsation Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Characterised By The Charging Evacuation (AREA)
Description
【考案の詳細な説明】
本考案は、多気筒エンジンの吸気装置、殊に吸
気脈動を利用して吸気過給を行なうようにした多
気筒エンジンの吸気装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intake system for a multi-cylinder engine, and particularly to an intake system for a multi-cylinder engine that performs intake supercharging using intake pulsation.
エンジンにおいて、燃焼室への吸気の周期的吸
入により生じる吸気脈動圧を利用して吸気過給を
行なうことは既に知られている。この種の吸気装
置は、吸気通路内を吸気口方向に伝播する正の圧
力波が吸気弁の閉じる直前に達するように吸気脈
動の周期と吸気弁開閉周期とをマツチングさせ、
正の圧力の吸気が慣性により燃焼室に押し込まれ
るようにしたものである。実開昭56−105623号と
して公開された実願昭55−2403号には、この吸気
方式を多気筒エンジンに適用した例が開示されて
おり、この構造では、吸気弁の開放時期がオーバ
ーラツプしないシリンダ同志を一つの組として、
シリンダを２つの組に分け、それぞれの組には、
その組のシリンダに連通する共鳴室を設け、かつ
そのようにして設けた２つの共鳴室を互に連通さ
せる第３の共鳴室を設けている。具体的には、直
列６気筒エンジンにおいて、第１、第２、第３シ
リンダが第１の組に、第４、第５、第６シリンダ
が第２の組に含まれるエンジンが示されている。
この例に示されるように、６気筒エンジンの場合
は、隣り合つた３個のシリンダにおいて吸気弁の
開放時期のオーバーラツプしない点火順序とする
ことができるので特に問題はないが、直列４気筒
エンジンの場合には、上述の組分けは、両端の２
つのシリンダすなわち第１、第４シリンダが一つ
の組に、中央の２つのシリンダすなわち第２、第
３シリンダが他の一つの組になるので、それぞれ
の組のシリンダに連通する２つの共鳴室の配置が
困難になる。また、燃料分配の関係から各共鳴室
の出口付近に燃料噴射を行なうことが好ましい
が、直列４気筒エンジンでは共鳴室への燃料噴射
ノズルの取付けが困難になる。 2. Description of the Related Art In engines, it is already known that intake air supercharging is performed using intake pulsating pressure generated by periodic intake of intake air into a combustion chamber. This type of intake device matches the intake pulsation cycle and the intake valve opening/closing cycle so that the positive pressure wave propagating in the intake passage toward the intake port reaches the intake valve just before closing.
Positive pressure intake air is forced into the combustion chamber by inertia. Utility Model Application No. 55-2403, published as Utility Model Application No. 56-105623, discloses an example in which this intake system is applied to a multi-cylinder engine, and with this structure, the opening timings of the intake valves do not overlap. Combining cylinders as one group,
Divide the cylinder into two groups, and each group has
A resonance chamber is provided that communicates with the cylinders of the set, and a third resonance chamber is provided that allows the two resonance chambers thus provided to communicate with each other. Specifically, an in-line six-cylinder engine is shown in which the first, second, and third cylinders are included in a first set, and the fourth, fifth, and sixth cylinders are included in a second set. .
As shown in this example, in the case of a 6-cylinder engine, there is no particular problem because the ignition order can be set so that the opening timings of the intake valves of three adjacent cylinders do not overlap, but in the case of an in-line 4-cylinder engine, there is no problem. In this case, the above grouping is
The two cylinders, that is, the first and fourth cylinders, form one set, and the two central cylinders, that is, the second and third cylinders, form another set, so the two resonance chambers that communicate with the cylinders of each set are Placement becomes difficult. Further, from the standpoint of fuel distribution, it is preferable to inject fuel near the outlet of each resonance chamber, but in an in-line four-cylinder engine, it is difficult to attach a fuel injection nozzle to the resonance chamber.
本考案は、吸気脈動圧を利用した多気筒エンジ
ンの吸気装置における上述の問題を解決し、直列
４気筒エンジンのように吸気弁開放時期のオーバ
ーラツプしないシリンダが互に隣り合つていない
ようなエンジンにおいても、共鳴室を容易に配置
することができ、かつ燃料噴射ノズルの取付けに
も支障を生じないような多気筒エンジンの吸気装
置を提供することを目的とする。 The present invention solves the above-mentioned problem in the intake system of a multi-cylinder engine that uses intake pulsation pressure, and is designed to solve the above-mentioned problems in the intake system of a multi-cylinder engine that uses intake pulsation pressure. Another object of the present invention is to provide an intake system for a multi-cylinder engine in which a resonance chamber can be easily arranged and a fuel injection nozzle can be attached without any problems.
すなわち、本考案による多気筒エンジンの吸気
装置は、列状に配列されたシリンダを有し、シリ
ンダ列方向に見て両側部にあり吸気弁開時期がオ
ーバーラツプしない複数のシリンダを互に連通さ
せる第１共鳴室と、シリンダ列方向に見て中央部
にあり吸気弁開時期がオーバーラツプしない複数
のシリンダを互に連通させる第２共鳴室と、前記
第１及び第２共鳴室を吸気流れ方向に見て上流側
で互に連通させる連通部とを備え、吸気脈動圧を
利用して吸気過給を行なうようになつた形式であ
つて、その特徴とするところは、上述の第１、第
２共鳴室をそれらの長軸がシリンダ列方向にのび
かつ各長軸がほぼ平行となるようにシリンダ軸方
向上下に重ねて配置し、前記第２共鳴室を前記第
１共鳴室より下方に位置させ、前記第１共鳴室の
長軸を前記第２共鳴室の長軸より長く形成すると
共に、前記第１共鳴室の長軸方向中心部をシリン
ダから遠ざけ、前記第１及び第２共鳴室の下流側
端部に燃料噴射ノズルを取付けたことにある。 That is, the intake system for a multi-cylinder engine according to the present invention has cylinders arranged in a row, and has a plurality of cylinders located on both sides when viewed in the direction of the cylinder row, and which communicates with each other a plurality of cylinders whose intake valve opening timings do not overlap. a second resonance chamber that is located in the center when viewed in the direction of the cylinder rows and communicates with a plurality of cylinders whose intake valve opening timings do not overlap; and the first and second resonance chambers when viewed in the intake flow direction. This type is equipped with a communication section that communicates with each other on the upstream side, and performs intake supercharging using intake pulsating pressure.The feature is that the above-mentioned first and second resonance The chambers are arranged one above the other in the cylinder axis direction so that their long axes extend in the direction of the cylinder row and are substantially parallel, and the second resonance chamber is located below the first resonance chamber, The long axis of the first resonant chamber is formed to be longer than the long axis of the second resonant chamber, and the center of the first resonant chamber in the longitudinal direction is distanced from the cylinder, and the downstream side of the first and second resonant chambers is The reason is that a fuel injection nozzle is attached to the end.
本考案のこの構成によれば、第１、第２共鳴室
がそれらの長軸がシリンダ列方向にのびかつ各長
軸がほぼ平行となるようにシリンダ軸方向上下に
重ねて配置されるので、両共鳴室を一体的に鋳造
することが可能になり、かつ第２共鳴室を第１共
鳴室より下方に位置させ、前記第１共鳴室の長軸
を前記第２共鳴室の長軸より長く形成し、第１共
鳴室の長軸方向中央部をシリンダから遠ざけて位
置させるようにしたので、燃料噴射ノズルは、第
１、第２共鳴室の下流側端部に支障なく取付ける
ことができる。 According to this configuration of the present invention, the first and second resonance chambers are arranged one above the other in the cylinder axis direction so that their long axes extend in the cylinder row direction and are substantially parallel to each other. It becomes possible to integrally cast both resonance chambers, and the second resonance chamber is located below the first resonance chamber, and the long axis of the first resonance chamber is longer than the long axis of the second resonance chamber. Since the longitudinal center portion of the first resonance chamber is located away from the cylinder, the fuel injection nozzle can be attached to the downstream ends of the first and second resonance chambers without any problem.
以下、本考案の一実施例を図について説明する
と、まず第１図及び第２図において、シリンダボ
ア１が形成されたシリンダブロツク２の上部に
は、シリンダヘツド３が取付けられ、該シリンダ
ヘツド３にはシリンダボア１に通じる吸気口４及
び排気口５が形成され、吸気口４及び排気口５に
はそれぞれ吸気弁６及び排気弁７が配置されてい
る。第１図には１個しか示されていないが、シリ
ンダブロツク２には列状に配置された４個のシリ
ンダボア１が形成され、それぞれのシリンダボア
１に対応して吸気口４、排気口５及び吸気弁６、
排気弁７が設けられている。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings. First, in FIGS. 1 and 2, a cylinder head 3 is attached to the upper part of a cylinder block 2 in which a cylinder bore 1 is formed. An intake port 4 and an exhaust port 5 are formed which communicate with the cylinder bore 1, and an intake valve 6 and an exhaust valve 7 are arranged in the intake port 4 and the exhaust port 5, respectively. Although only one is shown in FIG. 1, four cylinder bores 1 arranged in a row are formed in the cylinder block 2, and an intake port 4, an exhaust port 5, and an exhaust port 5 correspond to each cylinder bore 1. intake valve 6,
An exhaust valve 7 is provided.
吸気系は、シリンダヘツド３の吸気口４に連通
する共鳴室を有する。この共鳴室は、シリンダ列
方向両端のシリンダすなわち第１及び第４シリン
ダに連通する第１共鳴室８と、中央側のシリンダ
すなわち第２及び第３シリンダに連通する第２共
鳴室９とからなり、第１、第２共鳴室８，９はそ
れぞれパイプ１０，１１により連通部としての第
３共鳴室１２に接続されている。第３共鳴室１２
は絞り弁機構１４を有する吸気通路１３に連通す
る。 The intake system has a resonance chamber communicating with the intake port 4 of the cylinder head 3. This resonance chamber consists of a first resonance chamber 8 that communicates with the cylinders at both ends in the cylinder row direction, that is, the first and fourth cylinders, and a second resonance chamber 9 that communicates with the center cylinder, that is, the second and third cylinders. , the first and second resonance chambers 8 and 9 are connected to a third resonance chamber 12 as a communication section through pipes 10 and 11, respectively. Third resonance chamber 12
communicates with an intake passage 13 having a throttle valve mechanism 14.
第２共鳴室９は、第１共鳴室８より下方に位置
させられ、第１共鳴室８の長軸は、第２共鳴室９
の長軸より長く形成され、第１共鳴室８は、第２
共鳴室９の上方に、それらの長軸がシリンダ列方
向にのびかつ各長軸がほぼ平行となるようにシリ
ンダ軸方向上下に重ねた状態で配置される。第
１、第２共鳴室８，９は一体に鋳造され、その取
付面１５においてシリンダヘツド３に取付けられ
る。第３図に示すように、第１共鳴室８は、長軸
方向中央部８ａがシリンダヘツド３への取付面１
５から遠ざけて形成され、両端部が両端のシリン
ダボア１に通じる吸気口４にそれぞれ接続される
ようになつている。第２共鳴室９は、第１共鳴室
８の下方にあつて、取付面１５において中央側の
シリンダボア１に通じる吸気口４に接続される。
第１及び第２共鳴室８，９は、それぞれの吸気口
４への接続部付近に燃料噴射ノズル取付穴１６が
形成されており、この取付穴１６には、第１図に
示すように燃料噴射ノズル１７が取付けられる。 The second resonance chamber 9 is located below the first resonance chamber 8, and the long axis of the first resonance chamber 8 is parallel to the second resonance chamber 9.
The first resonance chamber 8 is longer than the long axis of the second resonance chamber 8.
They are arranged above the resonance chamber 9 in such a manner that their long axes extend in the cylinder row direction and are stacked vertically in the cylinder axis direction so that their long axes are substantially parallel. The first and second resonance chambers 8, 9 are cast in one piece and are attached to the cylinder head 3 at their mounting surfaces 15. As shown in FIG. 3, the first resonance chamber 8 has a central portion 8a in the longitudinal direction that is connected to the mounting surface 1 to the cylinder head 3.
5, and both ends thereof are connected to intake ports 4 communicating with cylinder bores 1 at both ends. The second resonance chamber 9 is located below the first resonance chamber 8 and is connected to the intake port 4 communicating with the cylinder bore 1 on the center side at the mounting surface 15 .
A fuel injection nozzle mounting hole 16 is formed in each of the first and second resonance chambers 8, 9 near the connection to the intake port 4. A spray nozzle 17 is attached.
なお、第４図には、第３図を矢印Ｂ方向から見
た状態が示されており、第１共鳴室８の両端の開
口１８，１８、及び第２共鳴室９の両端の開口２
０，２０は、それぞれのシリンダの吸気口４に通
じている。また、第１共鳴室８のほぼ中央の開口
２２は、パイプ１０に通じ、第２共鳴室９のほぼ
中央の開口２４は、パイプ１１に通じている。 4 shows a state in which FIG. 3 is viewed from the direction of arrow B, and the openings 18, 18 at both ends of the first resonance chamber 8 and the openings 2 at both ends of the second resonance chamber 9 are shown in FIG.
0 and 20 communicate with the intake ports 4 of the respective cylinders. Further, an opening 22 in the substantially center of the first resonance chamber 8 communicates with the pipe 10, and an opening 24 in the substantially center of the second resonance chamber 9 communicates with the pipe 11.
第１共鳴室８は、第２共鳴室９のシリンダ軸方
向の上方にそれらの長軸がシリンダ列方向にのび
かつ各長軸がほぼ平行となるように配置されてい
るが、第１共鳴室８の長軸を第２共鳴室９の長軸
より長く形成すると共に、第１共鳴室８の長軸方
向中央部８ａがシリンダヘツド３への取付面１５
から遠ざけて配置されているので、第２共鳴室９
への燃料噴射ノズル１７の取付けにも支障を来さ
ない。したがつて、直列４気筒エンジンのよう
に、吸気弁の開放時期がオーバーラツプしないシ
リンダが、両側の２つと、中央側の２つという関
係になるエンジンにおいても、共鳴室を容易に配
置することができ、燃料噴射ノズルの取付けに支
障を来すことなく、第１、第２共鳴室を一体に形
成することができる。 The first resonance chamber 8 is arranged above the second resonance chamber 9 in the cylinder axis direction so that its long axes extend in the cylinder row direction and are substantially parallel to each other. The long axis of the first resonant chamber 8 is longer than the long axis of the second resonant chamber 9, and the central portion 8a in the longitudinal direction of the first resonant chamber 8 is attached to the mounting surface 15 to the cylinder head 3.
Since it is located far away from the second resonance chamber 9
There is no problem in attaching the fuel injection nozzle 17 to the. Therefore, even in an engine such as an in-line four-cylinder engine in which there are two cylinders on both sides and two in the center where the opening timings of the intake valves do not overlap, it is possible to easily arrange the resonance chamber. Therefore, the first and second resonance chambers can be integrally formed without hindrance to the installation of the fuel injection nozzle.
第１図は、本考案の一実施例を一部断面で示す
側面図で、断面は第３図のＡ−Ａ線に沿つて取つ
たものである。第２図は、第１図に示すエンジン
の平面図である。第３図は、第１、第２共鳴室の
平面図である。第４図は、第３図を矢印Ｂ方向か
ら見た状態を示す正面図である。
２……シリンダブロツク、３……シリンダヘツ
ド、４……吸気口、８……第１共鳴室、９……第
２共鳴室、１２……第３共鳴室。
FIG. 1 is a partially sectional side view of an embodiment of the present invention, and the cross section is taken along line A--A in FIG. 3. FIG. 2 is a plan view of the engine shown in FIG. 1. FIG. 3 is a plan view of the first and second resonance chambers. FIG. 4 is a front view of FIG. 3 viewed from the direction of arrow B. 2...Cylinder block, 3...Cylinder head, 4...Intake port, 8...First resonance chamber, 9...Second resonance chamber, 12...Third resonance chamber.
Claims (1)
方向に見て両側部にあり吸気弁開時期がオーバー
ラツプしない複数のシリンダを互に連通させる第
１共鳴室と、シリンダ列方向に見て中央部にあり
吸気弁開時期がオーバーラツプしない複数のシリ
ンダを互に連通させる第２共鳴室と、前記第１及
び第２共鳴室を吸気流れ方向に見て上流側で互に
連通させる連通部とを備え、吸気脈動圧を利用し
て吸気過給を行なうようになつた多気筒エンジン
の吸気装置において、前記第１及び第２共鳴室を
それらの長軸がシリンダ列方向にのびかつ各長軸
がほぼ平行となるようにシリンダ軸方向上下に重
ねて配置し、前記第２共鳴室を前記第１共鳴室よ
り下方に位置させ、前記第１共鳴室の長軸を前記
第２共鳴室の長軸より長く形成すると共に、前記
第１共鳴室の長軸方向中央部をシリンダから遠ざ
け前記第１及び第２共鳴室の下流側端部に燃料噴
射ノズルを取付けたことを特徴とする多気筒エン
ジンの吸気装置。 A first resonance chamber that has cylinders arranged in a row and is located on both sides when viewed in the direction of the cylinder rows and communicates with a plurality of cylinders whose intake valve opening timings do not overlap, and a central portion when viewed in the direction of the cylinder rows. a second resonance chamber that communicates with each other a plurality of cylinders whose intake valve opening timings do not overlap; and a communication section that communicates the first and second resonance chambers with each other on the upstream side when viewed in the intake flow direction. In an intake system for a multi-cylinder engine that performs intake supercharging using intake pulsating pressure, the long axes of the first and second resonance chambers extend in the cylinder row direction and each long axis is approximately The cylinders are arranged vertically in parallel in the axial direction, and the second resonance chamber is located below the first resonance chamber, and the long axis of the first resonance chamber is lower than the long axis of the second resonance chamber. The intake air of a multi-cylinder engine is characterized in that the first resonance chamber is formed to be long, and a fuel injection nozzle is attached to downstream end portions of the first and second resonance chambers, with a center portion in the longitudinal direction of the first resonance chamber away from the cylinder. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7835882U JPS58180330U (en) | 1982-05-27 | 1982-05-27 | Intake system for multi-cylinder engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7835882U JPS58180330U (en) | 1982-05-27 | 1982-05-27 | Intake system for multi-cylinder engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58180330U JPS58180330U (en) | 1983-12-02 |
| JPS6246808Y2 true JPS6246808Y2 (en) | 1987-12-21 |
Family
ID=30087578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7835882U Granted JPS58180330U (en) | 1982-05-27 | 1982-05-27 | Intake system for multi-cylinder engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58180330U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5531237U (en) * | 1978-08-23 | 1980-02-28 |
-
1982
- 1982-05-27 JP JP7835882U patent/JPS58180330U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5531237U (en) * | 1978-08-23 | 1980-02-28 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58180330U (en) | 1983-12-02 |
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